133108955281 has 9 divisors (see below), whose sum is σ = 135349471569. Its totient is φ = 130904950800.

The previous prime is 133108955279. The next prime is 133108955303. The reversal of 133108955281 is 182559801331.

The square root of 133108955281 is 364841.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 117792417681 + 15316537600 = 343209^2 + 123760^2 .

It is not a de Polignac number, because 133108955281 - 2¹ = 133108955279 is a prime.

It is a super-2 number, since 2×133108955281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133108955261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22252311 + ... + 22258291.

Almost surely, 2^133108955281 is an apocalyptic number.

133108955281 is the 364841-st square number.

133108955281 is the 182421-st centered octagonal number.

It is an amenable number.

133108955281 is a deficient number, since it is larger than the sum of its proper divisors (2240516288).

133108955281 is an frugal number, since it uses more digits than its factorization.

133108955281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084 (or 6042 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 133108955281 in words is "one hundred thirty-three billion, one hundred eight million, nine hundred fifty-five thousand, two hundred eighty-one".